Which subjects interested Max Planck as a student at Maximilian Gymnasium?

At the Maximilian Gymnasium, Max Planck developed a strong interest in physics and mathematics, an interest stimulated by his teacher, Hermann Müller.12

Although he excelled in all subjects during his time at the school, he ultimately chose to pursue physics over other fields such as classical philology or music because he concluded that his greatest originality lay in the study of physics. Even during his years as a student at the Gymnasium, he was already deeply impressed by the law of the conservation of energy.2